Performance of Seed Treatments and in-Furrow at-Plant Insecticides for Protection Against Cry3Bb1-Resistant Western Corn Rootworm, 2015

Authors

Jonas Victor de Macedo,, Ministry of Education of BrazilFollow
Kayla A. Mollet, University of Nebraska-LincolnFollow
Julie A. Peterson, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

2017

Citation

Arthropod Management Tests, 2017, 1–2. doi: 10.1093/amt/tsx001
Section F: Field & Cereal Crops

Comments

Copyright 2017 The Authors. Published by Oxford University Press on behalf of Entomological Society of America. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License

Abstract

The western corn rootworm is an important pest of corn that can compromise yield by feeding on plant roots during its larval stage. WCRW management has been complicated by the development of resistance in some regions, including Nebraska, to transgenic Bacillus thuringiensis (Bt) traits, particularly the protein Cry3Bb1, which confers cross-resistance to mCry3A. A field trial was established to evaluate the efficacy of neonicotinoid seed treatments in combination with in-furrow insecticides on a corn hybrid expressing mCry3A Bt proteins against corn rootworm in an area with a history of rootworm resistance. The trial was conducted in a farmer’s field in Keith County near Ogallala, Nebraska, USA (41.116736° N, –101.652410° W), between 8 Jun and 6 Oct 2015. Damage from WCRW to corn expressing Cry3Bb1 proteins was documented in the field during the previous season.